/*-
 * MessagePollerProxy.java
 *
 * $LastChangedBy:  $
 * $LastChangedRevision:  $
 * $LastChangedDate:  $
 * $HeadURL: $
 *
 * Copyright (c) 2008, Stein Gunnar Bakkeby
 * All rights reserved.
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of Stein Gunnar Bakkeby nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.googlecode.attention;

import java.io.Serializable;
import java.rmi.RemoteException;
import java.rmi.server.UnicastRemoteObject;
import java.util.Collection;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;

import com.googlecode.attention.MessagePoller;
import com.googlecode.attention.Pollable;
import com.googlecode.attention.SMSEntry;
import com.googlecode.attention.Status;


public class MessagePollerProxy extends UnicastRemoteObject implements MessagePoller, Serializable {

  private static final long serialVersionUID = 7071012368587516135L;
  
  private final BlockingQueue<SMSEntry> messageQueue;
  private final transient Pollable poller;
  
  public MessagePollerProxy(final Pollable poller) throws RemoteException {
    messageQueue = new ArrayBlockingQueue<SMSEntry>(256);
    this.poller = poller;
  }
  
  public SMSEntry[] getMessages() throws RemoteException {
    final SMSEntry[] output;
    synchronized(messageQueue) {
      output = messageQueue.toArray(new SMSEntry[messageQueue.size()]);
      messageQueue.clear();
    }
    return output;
  }
  
  public void addMessages(final Collection<SMSEntry> entries) {
    messageQueue.addAll(entries);
  }

  public boolean hasMessages() throws RemoteException {
    return !messageQueue.isEmpty();
  }

  public SMSEntry poll(Status pollStatus) throws RemoteException {
    if (poller == null) System.out.println("poller is null");
    else poller.poll(pollStatus);
    try {
      return messageQueue.take();
    } catch (InterruptedException e) {
      e.printStackTrace();
      return null;
    }
  }
}